Turkey’s foreign minister is set to travel to Russia on Monday to discuss the situation in Ukraine, following direct talks earlier this month in Istanbul between the two sides in conflict.

The talks took place in the warring capitals of Moscow and Kyiv, from Washington and Riyadh, Saudi Arabia, to countries across Europe.

The first direct peace talks between Russia and Ukraine in more than three years lasted well under two hours, with no apparent sign of progress so far in narrowing the gap between the sides, and a Ukrainian source called Moscow's demands "non-starters".